Home / 13,142.89-18,136.67-7,174.55

Finding the Fourth Proportional to 13,142.89, 18,136.67 and 7,174.55

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Solution

The fourth proportional to 13,142.89, 18,136.67 and 7,174.55 is: 9,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.89 : 18,136.67 = 7,174.55 : x
  2. Step 2: Convert to fraction form
    13,142.89/18,136.67 = 7,174.55/x
  3. Step 3: Cross multiply
    13,142.89x = 18,136.67 × 7,174.55
  4. Step 4: Simplify right side
    13,142.89x = 130,122,445.75
  5. Step 5: Solve for x
    x = 130,122,445.75/13,142.89
  6. Step 6: Final answer
    x = 9,900.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.